1.guest是可数名词,基本意思是“客”,指受到热情款待来访〔住〕者,也可作“旅客”“宿客”解。
2.guest还可指“客串演员”,指特约的演出者或受特别邀请访问某地、参加某会议的人。
3.guest在句中有时可作定语。

be my guest
〈非正〉请(自)便 please do
“May I use your dictionary?”“Be my guest!”“我能用一下你的词典吗?”“请便。”
“Those grapes on the table look tasty and juicy.”“Be my guest!I grew them in my back garden.”“桌子上的葡萄看来汁多好吃。”“请随意,我在后院自己种的。”
“May I use your telephone?”“Be my guest.”“我可以用一下你的电话吗?”“别客气,请便。”

He looked after his guest very well.他对客人照顾得很好。
He is an unexpected guest to her.对于她来说,他可是位不速之客。
She welcomed her guests in a gracious manner.她以亲切的态度欢迎客人。
He always sets a generous table for guests.他招待客人吃饭时,菜式总是十分丰富。
A good host is considerate to the need of his guests.好主人总是体贴地考虑到客人的需要。
Go and make yourself amiable to the guests.去亲切地待客。
They are coming to the concert as my guests.他们将作为我的客人来听音乐会。
Dinner was through by the time the guests arrived.客人到来时,晚饭已经准备好了。
The sudden arrival of guests forced her to change her plans.客人们的突然来到迫使她改变了计划。
Only a few select guests were invited to the party.只是有选择地邀请了几个客人参加宴会。
Many guests were invited to the opening ceremony.许多来宾应邀参加了开幕式。
The hotel will be open for guests next January.那旅馆将于明年一月开始接待客人。
She is a transient guest at the hotel.她在这个旅馆暂住。
She takes in paying guests during the summer.夏季她接待付费的住宿者。
Ladies and gentlemen, please welcome tonight's special guest.女士们,先生们,请大家欢迎今晚的特邀嘉宾。
She made a guest appearance on Mike's TV show.她在迈克的电视节目里出场客串。

guest, visitor
这两个词的共同意思是“客人”。其区别是:visitor不一定是事先邀请好的,也不一定受到款待; 而guest一般是事先受到邀请并受到款待的。例如:
She has many visitors today.她今天客人很多。
She's having a guest for dinner tonight.她今晚有位客人来吃饭。
guest, customer, shopper
参见customer条。

现代英语中称移居欧洲共同体国家当工人的人为guest worker。

［同义词］   caller, company, regular, visitor
［词源］  ＜中古英语gest (客人,陌生人)